Created
July 31, 2014 14:50
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three different implementations of liftM
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| liftM f m = m >>= (return . f) | |
| liftM f m = do | |
| a <- m | |
| return (f a) | |
| -- which is just sugar for: | |
| liftM f m = | |
| m >>= \a -> | |
| return (f a) |
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